microfilament vs. microtubule

which of the following apply to microtubules, which to microfilaments and which to both?
1. all the nucleotide-binding sites point the same direction
2. monomers bind GTP
3. dimers polymerize into protofilaments that they associate side by side
4. structure is adouble chain of subunits
5. fibers polymerize and depolymerize quickly
6. 13 protofilaments associate to form a hollow tube
7. monomers bind ATP
8. polymer of globular subunits

i think that 1,2,5, and 6 are microtubules
3,4, and 7microfilaments
8 is both

is my answer correct? thank u!